I don't think anyone could say definitely one way or the other who is more likely to win, I have GSP winning by a late 4th or 5th stoppage, BJ hasn't shown he has the stamina to go much past 3rd round and GSP isn't the sort of fighter to get caught early on (well after the Serra fight anyway).
Either way Im pumped for this and really hope to god it doesnt go the distance as that would suck.... again